Transmission of light through slit apertures in metallic films

Transmission of polarized light through subwavelength slit apertures is studied based on the electromagnetic field distributions obtained in finite difference time domain computer simulations. The results show the existence of a cutoff for E/sub /spl par// and a strong transmission (with no cutoff) for E/sub /spl perp//, where /spl par/ and /spl perp/ refer to the direction of the incident E-field relative to the long axis of the slit. Interference between the charges and currents induced in the vicinity of two adjacent slits is shown to result in enhanced transmission through both slits when the slits are separated by about one- half of one wavelength.

[1]  S. Enoch,et al.  Resonant optical transmission through thin metallic films with and without holes. , 2003, Optics express.

[2]  P. Lalanne,et al.  One-mode model and Airy-like formulae for one-dimensional metallic gratings , 2000 .

[3]  M Mansuripur,et al.  Transmission of light through small elliptical apertures. , 2004, Optics express.

[4]  J. Pendry,et al.  Theory of extraordinary optical transmission through subwavelength hole arrays. , 2000, Physical review letters.

[5]  J Bravo-Abad,et al.  Transmission properties of a single metallic slit: from the subwavelength regime to the geometrical-optics limit. , 2004, Physical review. E, Statistical, nonlinear, and soft matter physics.

[6]  Thomas W. Ebbesen,et al.  Surface plasmons enhance optical transmission through subwavelength holes , 1998 .

[7]  F. García-Vidal,et al.  Transmission Resonances on Metallic Gratings with Very Narrow Slits , 1999, cond-mat/9904365.

[8]  H. Lezec,et al.  Multiple paths to enhance optical transmission through a single subwavelength slit. , 2003, Physical review letters.

[9]  H. Lezec,et al.  Extraordinary optical transmission through sub-wavelength hole arrays , 1998, Nature.

[10]  J. Sambles,et al.  Resonant transmission of microwaves through a narrow metallic slit. , 2002, Physical review letters.

[11]  R. Fox,et al.  Classical Electrodynamics, 3rd ed. , 1999 .

[12]  Allen Taflove,et al.  Computational Electrodynamics the Finite-Difference Time-Domain Method , 1995 .

[13]  John Roy Sambles,et al.  Surface plasmon polaritons on narrow-ridged short-pitch metal gratings in the conical mount , 2003 .